CORRESPONDENCE_1999-2002 - Laserfiche WebLink

Home Browse Search

Michael Kalish February 5, 2001 Page 3 of 6 • Maps/plans showing current site topography, site boundaries, structures, and utilities (hard line and AutoCAD file versions). • As-built plans for the entire LFG collection and monitoring system. • Operating data for the existing LFG system for the past six months. • San Joaquin Valley Air Pollution Control District Rule 4642 surface emission monitoring data. • Recent and historical migration probe monitoring data for the past six months. • Soils,hydrogeologic and water quality monitoring data,including LFG probe and groundwater monitoring well boring logs, soil types, and depth and fluctuations of groundwater levels. • Agency correspondence outlining LFG control requirements or compliance deadlines specific to the Harney Lane Landfill. This information will be reviewed in conjunction with our operation and maintenance subsidiary SCS Field Services (SCS-FS). SCS-FS will review the information to see whether or not migration control can be enhanced through operational enhancements. SCS will evaluate alternative approaches for LFG migration control based on the findings of the data review and our experience with similar projects. Alternatives to be explored include: (1) modifications to existing wellfield O&M practices; or(2) upgrades to the extraction or monitoring systems. We will prepare a task memorandum summarizing recommendations for further action if necessary as outlined below. Task 2. Conduct Initial Wellfield Reconnaissance. If results of Task 1 indicate that there are opportunities to improve LFG migration control through operational adjustments, representatives from SCS Field Services (SCS-FS) will accompany County Personnel to survey the wellfield, adjust individual wells,record gas quality readings,inspect and troubleshoot the blower/flare station equipment. The overall objectives of this reconnaissance are to optimize gas control in the area of G -3 while maintaining adequate gas quality for proper flare operation, and adequate emission and migration control in all other areas of the landfill. We have budgeted up to 5 person days for SCS-FS for this initial event. The effectiveness of this initial effort will be evaluated by review of data resulting from follow-up monitoring and wellfield balancing events.